Well, Charlee is pretty confident and he usually doesn’t shake, but Neva shakes all the time. She will just look at you and shake until you call her name. I’ve heard other people talking about their chihuahuas shaking too, so I know that it’s too uncommon. But I always had to wonder: Why do chihuahuas shake?
Most of the time, shaking is just part of the chihuahua’s normal behavior, and you should have nothing to worry about.
My Chihuahuas Blog 
Coco is a drama queen, I swear at times she does it so she gets picked up,. Or her own way. My son will come over with his Pit, and if the pit eats out of a certain bowl she looks at me and starts shaking away, i give the pit a different bowl and Coco stops shaking.
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My puppy is 12 weeks old and bits me all the time. How do I stop it?
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Ours did as well and will continue until it looses its baby teeth . Now she just licks us to death. we used a firm voice command of No and just try to discourage the pup from doing so.A water bottle seems to work for the nipping at the feet . Good luck
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